Indoor positioning could provide interesting services and applications. As one of the most popular indoor positioning methods, location fingerprinting determines the location of mobile users by matching the received signal strength (RSS) which is location dependent. However, fingerprinting-based indoor positioning requires calibration and updating of the fingerprints which is labor-intensive an...

The FingerPrint positioning method is known as a superior method in indoor positioning system that maintains previous signal strength patterns and compares with the measured new real-time signals on APs. In this paper, we analyze active signal phenomena using multi-rate Wi-Fi signals from reference AP which is accessed by multi-users. Some important factors which can effect to the accuracy by c...

Terrestrial communication signals, such as television, cellular and wireless LAN signals, have been pursued as ranging sources for deeper penetration into urban and indoor areas. However, because these signals are not designed for positioning and travel in severer multipath environments, there tend to be more outlying pseudorange measurements in terrestrial signal-based positioning systems than...

Real-time Precise Point Positioning (PPP) technique is being widely applied for providing precise positioning services with the significant improvement on satellite precise products accuracy. With the rapid development of the multi-constellation Global Navigation Satellite Systems (multi-GNSS), currently, about 80 navigation satellites are operational in orbit. Obviously, PPP performance is dra...

AIM To evaluate whether implant design, glenoid positioning, and other factors influenced instability and scapular notching in reverse total shoulder arthroplasty. METHODS We retrospectively reviewed records of patients who had undergone reverse total shoulder arthroplasty by the senior author from July 2004 through October 2011 and who had at least 24 mo of follow-up. The 58 patients who met...